[Taqwus]

GrobRIM said:
But maybe the 50-turn limit should be made more flexible; for example, once turn 50 is reached, give another 5-turn grace period, after which the battle is ended, unless at least one unit has been killed, in which case we reset the countdown to another 5 turns; or, instead of counting the number of units killed, take into account the net amount between units killed and units created.

Non-summons units, perhaps. If you just kill battlefield summons, the battle may be at a stalemate (ex. two skellispammers facing off...). If you're killing the -original- components of the armies, those numbers can't increase during battle.